Apparatus for mining coal.



H. A. KUHN.

APPARATUS FOR MINING CUALy m'rmnmu men MAYIH. w14

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WITNESSES HARRY A. KUHN, 0F PITTSBURGH, PENNSYLVANIA.

APPARATUS FOB MINING COAL.

Specication of Letters Patent.

Patented July 23, 1918.

Application led Hay i8, 1914. Serial No. 839,331.

To all whom t may concern.-

Be it known that I, HARRY A. KUHN, a citizen of the United Sintes, and resident of Pittsburgh7 in the county of Allegheny and State of Pennsylvania, hu ve invented a new and useful Improvement in Apparatus for Mining Coal; and I do hereby declare the following to be :i full, clear, and exact description thereof.

My invention relates to mining machines.

In an application for Letters Patent of the United States, Serial No. 796,497, I have set forth and described the method of mining coal in which'un undercut is first made in the wall oi coal und the coal is then separated along its lines of cleavage by shooting in the ordinary manner, and tl'iereupon the coal is luidermined and conveyed away. The present invention has reference to a machine in the operation of which the above method may be employed, and in addition, I pro vide means for advancing i -iking or disrupting devices at different heights working from the top to the bottom, and at the same time the coal is being undermined and car ried away, these raking devices acting to move in a vertical plane at different levels and Working in such way as to dislod ae the coal and drop it onto the conveyor be ow.

In the accompanying drawings, Figure 1. is a plan view of my `improved machine; Fig. 2 is a side elevation partly in section; Fig. 3 is an enlarge section on the line 33, Fig. 1z and Fig. 4 is a section on the line 4 4, Fig. 1.

In the drawings the machine for undermining the coal and conveying it away, is thel same` form of machine which is illustrated and described in anl application of even date. herewith, Serial No. 839,325, and is illustrated more or less diagrammatically. The frame 2 is carried by the traction wheels 3s and inclosed 'within the box or housin il. are the gear connections which drive t, 1e traction Wheels 3, and the lever 5 is employed forgiving the forward or backward movement to the traction wheels 3, in advancing and withdrawing the frame 2. On the frame 2 is the motore whose shaft 7 is provided with the pinion 8 mesh ing with the gear Wheel 9 on the countershaft 10. The pinion 11 onvthe countershaft 10 engages the gear wheel 12 on the worm shaft 13. The Worm 14 engages the worm wheel l5 on the shaft 16 and from this Worm Wheel power is transmitted to thc gear in the housing 4 which drives the traction Wheels 3.

The shaft 13 is connectedup by suitable Clutch mechanism with the shaft 17 and 60 said shaft 17 as the beveled pinion 18 which 4 meshes with the beveled teeth `19 on the large sprocket wheel 20 mounted on the shaft 2. A chain 22 engages the `sprocket wheel 20 and said chain passes around the 65 sprocket wheels 23 et the forward end di the frame 2. The chain 22 has the iighti 2.4 and the cutters 25 said flights moving along the pan 2G. all as illustrated and described in thefaforesaid ap lication. The frame 2 inclines downward y and is supported near its front end by the rollers 27.

A beveled pinion 28 on the countershaft l0 meshes with the beveled pi ion 29 on the shaft 30. A sprocket whee 3l on .the 75 shaft 3() is engaged by thechaiii 32 which extends up and around the sprocket wheel 33 on the shaft 34 journa-led in suitable beerings in the uprights 35. The shaft. 34 has' the beveled pinion 36 which meshes with 80 the beveled pinion 87 on the shaft 38.4 The shaft 38 is provided with the key 39 which engages the key-Way in the beveled gear 37, so as to provide for the longitudinal move A ment of seid shaft 38 for the reasons here- 85 inafter set forth.

The swinging frame 40 has a"pivotal c0n-, nection il with the uprights 42 on the frilluo 2 and said swinging' frame 40 is composed of the side channel members 43. To supyyo. port the forward end of the vSwingin frame C' 40,4 I provide the upri ht bers'44 w ich ex-f tend up Vthrough the anges of the channel members 43.

These bars 44 are provided' with the rack t faces 45 with which the pinions 46 enge i said pinions being mounted on theshaft journaled in the brackets 4S on the charme members 43 of the swinging frame 40. A. crank 49 `is secured to the shaft 47 and by 100 turning said crank, the swinging frame 40 israised and .lowered `at its forward end swinging on. an arc described by the rack face 45. y

A sliding swinging rame 40 at the forward end thereof, said frame having the plates 51 which engage the upper and lower flanges of the channel members 43 of seid swin ing frame as clearly indicated in Fig. 4. his sliding frame 5() has the threaded blocks 52 with which the threaded feed bars 53 frame 5 is mounted on the 105 engage, said threaded feed hars being jour naled .in bearings in the swinging frame 4()` The inner ends of said feed bars are provided with the sprocket wheels 54- connected up by a chain 55, one oft said feed bars being provided with the crank 56, so that by turning Said crank a simultaneous rotary movement is imparted to b oth feed bars and the sliding frame 50 isfed forward or backward on the swinging frame 40 according to the direction of rotation given to saidfeed bars.

The slidin frame 50'carries the raking or disrupting evices, and said devices comn prise'the guide frame 57 for the chain 58 vwhich carries suitable raking or disrupting members 59. The chain 58 passes around the sprocket wheels 60 and 61 :it the inner and outer ends of thel guide frame 57, respectively. The sprocket wheels 60 are mounted on the shaft 62 which is mounted in bearings on the sliding frame 50, said shaft extending through slots 63 in the channel members 43 of the swinging franse 40, as clearly indicated in Fig, 3. Power to drive the shaft 62 is obtained from the shaft 38, said shaft having the beveled pinion 64 which meshes with the beveled pinion 65 on the shaft 62. ,t

As above stated, my improved machine is applicable for use 1n connection with a method of mining coal set forth' in the above mentioned application, and the coal having been undercut and separated along its lines of cleavage by shooting, so as to lower the coal into the undercut, as indicated in Fig. 2, my improved machine is then brought into play, and as indicated in Fig.y 2 the machine is being advanced with its lower disrupting and conveyin n'iechanisni trav cling along the floor of t e mine in the line of the original undercut and the sliding frame 50 having been advanced by turning the crank 56 the said disrupting devices are then moved downwardly. This is accomplished by turning the crank 49 which lowers the frontend of the swinging frame 40 of a circle described bythe rack faces t5 and frame 57 also movein a like are and in their downward movement. the disrupting mem-r bers act to tear or disrupt the coal so as to coperate with the conveyer below in such a. Way that the coal disrupted by the said devices is dropped onto the conve-yer and carried away. The swinging frame moving iin the are ofa circle, as above described is fradually lowered and with it the disrupt ng devices, so that the entire mass of coal is acted on by the sweep of the swin ing frame. W'hen the swinging frame has een lowered to its lowest position, it is again raised by turning the crank 56, and the machine is again advanced into the coal which has been loosened along its lines of cleavage and another downward movement of the swinging frame and its disrupting devicesl is inade which results in a further removal of the muss of coal until all the con] which has been separated on its lines of cleavage is removed and another undercutting and shooting of the coal is required for the further operation ci the machine. it is apparent that the disrupting members 59 mi ht he turned in the opposite direction and y reversing thil motor the disrupting r.le\.fice.-y could bc moved upwardly to disrupt the coal.

What I claim is:

1. In a mining-machine, the combination n'ith a Suitable frame, dislodging and conveying means carried thereby, operating along a horizontal plane, a vertically swinging trame, means for raising and lowering the said swinging frame,`a sliding frame on said swinging frame, means for advancin and withdrawing said sliding frame, .an disrupting devices carried by said sliding frame.

2.` In a 1nining-1nachine, the combination with a suitable frame, dislodging and conveyiufr means carried bv said frame, operating along a horizontal plane, a vertically swinging freine on said first frame, means for raising and lowering said swinging frame, a sliding frame on said swinging frame, a threaded feed-bar on said swinging frame engaging said sliding frame, and dis rupting devices carried by said sliding frame. and sind swinging frame moving in the are i In testimony Wheljeof, I the Asaid HARRY A. KUHN have hereunto set my hand.

HARRY A. KUHN.

Witnesses JOHN F. WILL, Roer. D. TorrEN.

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